In-depth comparison of Anc80L65 and AAV9 retinal targeting and characterization of cross-reactivity to multiple AAV serotypes in humans.

Anc80L65 is a synthetic, ancestral adeno-associated virus that has high tropism toward retinal photoreceptors after subretinal injection in mice and non-human primates. We characterized, for the first time, the post-intravitreal cell-specific transduction profile of Anc80L65 compared with AAV9. Here we use Anc80L65 and AAV9 to intravitreally deliver a copy of the gene encoding GFP into WT C57Bl/6J mice. GFP expression was driven by one of two clinically relevant promoters, chicken ß actin (CB) or truncated MECP2 (P546). After qualitative assessment of relative GFP expression, we found Anc80L65 and AAV9 to have similar transduction profiles. Through the development of a novel method for quantifying GFP-positive retinal cells, we found Anc80L65 to have higher tropism in Müller glia and AAV9 to have higher tropism in horizontal cells. In addition, we found P546 to promote GFP expression at a more moderate level compared with the high levels seen under the CB promoter. Finally, for the first time, we characterized Anc80L65 cross-reactivity in human sera; 83% of patients with AAV2 pre-existing antibodies were found to be seropositive for Anc80L65. This study demonstrates the expanded therapeutic applications of Anc80L65 to treat retinal disease and provides the first insights to Anc80L65 pre-existing immunity in humans.

A Trypanosoma cruzi phosphoglycerate kinase isoform with a Per-Arnt-Sim domain acts as a possible sensor for intracellular conditions.

Per-ARNT-Sim (PAS) domains constitute a family of domains present in a wide variety of prokaryotic and eukaryotic organisms. They form part of the structure of various proteins involved in diverse cellular processes. Regulation of enzymatic activity and adaptation to environmental conditions, by binding small ligands, are the main functions attributed to PAS-containing proteins. Recently, genes for a diverse set of proteins with a PAS domain were identified in the genomes of several protists belonging to the group of kinetoplastids, however, until now few of these proteins have been characterized. In this work, we characterize a phosphoglycerate kinase containing a PAS domain present in Trypanosoma cruzi (TcPAS-PGK). This PGK isoform is an active enzyme of 58 kDa with a PAS domain located at its N-terminal end. We identified the protein's localization within glycosomes of the epimastigote form of the parasite by differential centrifugation and selective permeabilization of its membranes with digitonin, as well as in an enriched mitochondrial fraction. Heterologous expression systems were developed for the protein with the N-terminal PAS domain (PAS-PGKc) and without it (PAS-PGKt), and the substrate affinities of both forms of the protein were determined. The enzyme does not exhibit standard Michaelis-Menten kinetics. When evaluating the dependence of the specific activity of the recombinant PAS-PGK on the concentration of its substrates 3-phosphoglycerate (3PGA) and ATP, two peaks of maximal activity were found for the complete enzyme with the PAS domain and a single peak for the enzyme without the domain. Km values measured for 3PGA were 219 ± 26 and 8.8 ± 1.3 µM, and for ATP 291 ± 15 and 38 ± 2.2 µM, for the first peak of PAS-PGKc and for PAS-PGKt, respectively, whereas for the second PAS-PGKc peak values of approximately 1.1-1.2 mM were estimated for both substrates. Both recombinant proteins show inhibition by high concentrations of their substrates, ATP and 3PGA. The presence of hemin and FAD exerts a stimulatory effect on PAS-PGKc, increasing the specific activity by up to 55%. This stimulation is not observed in the absence of the PAS domain. It strongly suggests that the PAS domain has an important function in vivo in T. cruzi in the modulation of the catalytic activity of this PGK isoform. In addition, the PAS-PGK through its PAS and PGK domains could act as a sensor for intracellular conditions in the parasite to adjust its intermediary metabolism.

CuATSM effectively ameliorates ALS patient astrocyte-mediated motor neuron toxicity in human in vitro models of amyotrophic lateral sclerosis.

Patient diversity and unknown disease cause are major challenges for drug development and clinical trial design for amyotrophic lateral sclerosis (ALS). Transgenic animal models do not adequately reflect the heterogeneity of ALS. Direct reprogramming of patient fibroblasts to neuronal progenitor cells and subsequent differentiation into patient astrocytes allows rapid generation of disease relevant cell types. Thus, this methodology can facilitate compound testing in a diverse genetic background resulting in a more representative population for therapeutic evaluation. Here, we used established co-culture assays with motor neurons and reprogrammed patient skin-derived astrocytes (iAs) to evaluate the effects of (SP-4-2)-[[2,2'-(1,2-dimethyl-1,2-ethanediylidene)bis[N-methylhydrazinecarbothioamidato-κN2 ,κS]](2-)]-copper (CuATSM), currently in clinical trial for ALS in Australia. Pretreatment of iAs with CuATSM had a differential effect on neuronal survival following co-culture with healthy motor neurons. Using this assay, we identified responding and non-responding cell lines for both sporadic and familial ALS (mutant SOD1 and C9ORF72). Importantly, elevated mitochondrial respiration was the common denominator in all CuATSM-responders, a metabolic phenotype not observed in non-responders. Pre-treatment of iAs with CuATSM restored mitochondrial activity to levels comparable to healthy controls. Hence, this metabolic parameter might allow selection of patient subpopulations best suited for CuATSM treatment. Moreover, CuATSM might have additional therapeutic value for mitochondrial disorders. Enhanced understanding of patient-specific cellular and molecular profiles could help improve clinical trial design in the future.

Structural Insights into Microbial One-Carbon Metabolic Enzymes Ni-Fe-S-Dependent Carbon Monoxide Dehydrogenases and Acetyl-CoA Synthases.

Ni-Fe-S-dependent carbon monoxide dehydrogenases (CODHs) are enzymes that interconvert CO and CO2 by using their catalytic Ni-Fe-S C-cluster and their Fe-S B- and D-clusters for electron transfer. CODHs are important in the microbiota of animals such as humans, ruminants, and termites because they can facilitate the use of CO and CO2 as carbon sources and serve to maintain redox homeostasis. The bifunctional carbon monoxide dehydrogenase/acetyl-CoA synthase (CODH/ACS) is responsible for acetate production via the Wood-Ljungdahl pathway, where acetyl-CoA is assembled from two CO2-derived one-carbon units. A Ni-Fe-S A-cluster is key to this chemistry. Whereas acetogens use the A- and C-clusters of CODH/ACS to produce acetate from CO2, methanogens use A- and C-clusters of an acetyl-CoA decarbonylase/synthase complex (ACDS) to break down acetate en route to CO2 and methane production. Here we review some of the recent advances in understanding the structure and mechanism of CODHs, CODH/ACSs, and ACDSs, their unusual metallocofactors, and their unique metabolic roles in the human gut and elsewhere.

A method for transforming knowledge discovery metamodel to ArchiMate models.

Enterprise architecture has become an important driver to facilitate digital transformation in companies, since it allows to manage IT and business in a holistic and integrated manner by establishing connections among technology concerns and strategical/motivational ones. Enterprise architecture modelling is critical to accurately represent business and their IT assets in combination. This modelling is important when companies start to manage their enterprise architecture, but also when it is remodelled so that the enterprise architecture is realigned in a changing world. Enterprise architecture is commonly modelled by few experts in a manual way, which is error-prone and time-consuming and makes continuous realignment difficult. In contrast, other enterprise architecture modelling proposal automatically analyses some artefacts like source code, databases, services, etc. Previous automated modelling proposals focus on the analysis of individual artefacts with isolated transformations toward ArchiMate or other enterprise architecture notations and/or frameworks. We propose the usage of Knowledge Discovery Metamodel (KDM) to represent all the intermediate information retrieved from information systems' artefacts, which is then transformed into ArchiMate models. Thus, the core contribution of this paper is the model transformation between KDM and ArchiMate metamodels. The main implication of this proposal is that ArchiMate models are automatically generated from a common knowledge repository. Thereby, the relationships between different-nature artefacts can be exploited to get more complete and accurate enterprise architecture representations.

Longitudinal characterization of the tumoral microbiome during radiotherapy in HPV-associated oropharynx cancer.

PURPOSE: To describe the baseline and serial tumor microbiome in HPV-associated oropharynx cancer (OPC) over the course of radiotherapy (RT). METHODS: Patients with newly diagnosed HPV-associated OPC treated with definitive radiotherapy +/- concurrent chemotherapy were enrolled in this prospective study. Using 16S rRNA gene sequencing, dynamic changes in the tumor site microbiome during RT were investigated. Surface tumor samples were obtained before RT and at week 1, 3 and 5 of RT. Radiological primary tumor response at mid-treatment was categorized as complete (CR) or partial (PR). RESULTS: Ten patients were enrolled, but 9 patients were included in the final analysis. Mean age was 62 years (range: 51-71). As per AJCC 8th Ed, 56%, 22% and 22% of patients had stage I, II and III, respectively. At 4-weeks, 6 patients had CR and 3 patients had PR; at follow-up imaging post treatment, all patients had CR. The baseline diversity of the tumoral versus buccal microbiome was not statistically different. For the entire cohort, alpha diversity was significantly decreased over the course of treatment (p = 0.04). There was a significant alteration in the bacterial community within the first week of radiation. Baseline tumor alpha diversity of patients with CR was significantly higher than those with PR (p = 0.03). While patients with CR had significant reduction in diversity over the course of radiation (p = 0.01), the diversity remained unchanged in patients with PR. Patients with history of smoking had significantly increased abundance of  Kingella (0.05) and lower abundance of Stomatobaculum (p = 0.03) compared to never smokers. CONCLUSIONS: The tumor microbiome of HPV-associated OPC exhibits reduced alpha diversity and altered taxa abundance over the course of radiotherapy. The baseline bacterial profiles of smokers vs. non-smokers were inherently different. Baseline tumor alpha diversity of patients with CR was higher than patients with PR, suggesting that the microbiome deserves further investigation as a biomarker of radiation response.

La exposición prenatal a fluoruro induce cambios en la porción coronal de la cripta ósea y altera la erupción dental en crías lactantes / Prenatal fluoride exposure induces changes in the coronal portion of bony crypt and alters dental eruption in suckling rats

La erupción dental es un proceso estrictamente regulado y programado espacial y temporalmente. El objetivo del trabajo fue estudiar el efecto de la exposición prenatal a fluoruro de sodio (NaF) sobre los eventos morfológicos y celulares que ocurren en el hueso supracoronal del primer molar de crías de rata durante la etapa preeruptiva. Se emplearon crías (n=6-8 por grupo) provenientes de madres que bebieron crónicamente agua con diferentes concentraciones de F- en forma de NaF durante la gestación y lactancia: control y NaF (50 mg/L). En cortes histológicos de la mandíbula de crías de 3 y 10 días se analizaron parámetros de histomorfometría estática en la zona supracoronal de la canastilla ósea a la altura del primer molar inferior: volumen óseo trabecular [BV/TV (%)], número de osteoclastos por milímetro (N.Oc/mm) y las variables indirectas: número de trabéculas [Tb.N (1/mm)], espesor [Tb.Th (µm)] y separación trabecular [Tb.Sp (µm)]. En crías de 15 días se midió el grado de erupción [TED (µm)] del primer molar inferior. Los resultados se analizaron con el test "t" de Student considerando diferencias significativas a p<0,05. El análisis histomorfométrico demostró un incremento en el BV/TV (%) del hueso supracoronal (p<0,01) asociado con disminución del N.Oc/mm (p<0,01) en crías de 3 y 10 días expuestas prenatalmente al F-. El grado de erupción dental fue menor en animales expuestos prenatalmente al F- en comparación con los controles (p<0,01). En conclusión, los resultados observados en la mandíbula de crías expuestas durante la etapa prenatal y posnatal temprana al F- sugieren un efecto disruptivo sobre la actividad resortiva necesaria para formación del canal eruptivo. (AU)

Tooth eruption is a tightly regulated and spatially and temporally programmed process. The aim of this study was to examine the effect of prenatal NaF exposure on the morphological and cellular events that occur in the supracoronal area of bony crypt of the first rat molar during the preeruptive stage. Offspring from two groups of rats were used (6-8 per group): Control and 50 mg/L NaF. The treatment was performed during pregnancy and lactation. Suckling pups were euthanized at 3-, 10- and 15-days-old by cervical dislocation. Mandibles were removed and histologically processed to obtain buccolingual sections stained with H&E. In sections of first mandibular molar of 3- and 10-days-old pups, the following static histomorphometric parameters were evaluated: trabecular bone volume [BV/TV (%)] and number of osteoclasts (N.Oc/mm). Also, indirect parameters were obtained: trabecular number [Tb.N (1/mm)], trabecular thickness [Tb.Th (µm)], and trabecular separation [Tb.Sp (µm)]. The degree of tooth eruption [TED (µm)] was determined. Results are expressed as mean ± SE and analyzed by Student t-test. Histomorphometric analysis showed an increase in the BV/TV (%) of the bone crypt of 3- and 10- days-old pups exposed to NaF (p <0.01); this increase was associated with a decrease in the N.Oc/mm (p <0.01). TED of mandibular first molar was lower in prenatal NaF exposed group than in control group (p<0.01). In conclusion, the increased BV/TV and the lower N.Oc observed in the bone crypt of 3- and 10- days-old pups from mothers treated with NaF suggested a disruptive effect triggered by F- on the formation events of the eruptive pathway in the offspring. (AU)

Microbial Diversity and Composition Is Associated with Patient-Reported Toxicity during Chemoradiation Therapy for Cervical Cancer.

PURPOSE: Patients receiving pelvic radiation for cervical cancer experience high rates of acute gastrointestinal (GI) toxicity. The association of changes in the gut microbiome with bowel toxicity from radiation is not well characterized. METHODS AND MATERIALS: Thirty-five patients undergoing definitive chemoradiation therapy (CRT) underwent longitudinal sampling (baseline and weeks 1, 3, and 5) of the gut microbiome and prospective assessment of patient-reported GI toxicity. DNA was isolated from stool obtained at rectal examination and analyzed with 16S rRNA sequencing. GI toxicity was assessed with the Expanded Prostate Cancer Index Composite instrument to evaluate frequency, urgency, and discomfort associated with bowel function. Shannon diversity index was used to characterize alpha (within sample) diversity. Weighted UniFrac principle coordinates analysis was used to compare beta (between sample) diversity between samples using permutational multivariate analysis of variance. Linear discriminant analysis effect size highlighted microbial features that best distinguish categorized patient samples. RESULTS: Gut microbiome diversity continuously decreased over the course of CRT, with the largest decrease at week 5. Expanded Prostate Cancer Index Composite bowel function scores also declined over the course of treatment, reflecting increased symptom burden. At all individual time points, higher diversity of the gut microbiome was linearly correlated with better patient-reported GI function, but baseline diversity was not predictive of eventual outcome. Patients with high toxicity demonstrated different compositional changes during CRT in addition to compositional differences in Clostridia species. CONCLUSIONS: Over time, increased radiation toxicity is associated with decreased gut microbiome diversity. Baseline diversity is not predictive of end-of-treatment bowel toxicity, but composition may identify patients at risk for developing high toxicity.

Shunt independence in paediatric hydrocephalus: our 16-year experience and review.

PURPOSE: Shunt independence remains a matter of debate for neurosurgeons, and little information on this subject is available in the literature. The aims of the study were to analyse the incidence of shunt removal in a series of paediatric patients and to describe our experience with attempts at shunt removal. METHODS: Thirty of 212 paediatric patients shunted between 2000 and 2016 at our institution were studied for shunt independence. Variables related to hydrocephalus aetiology, shunt complications, independence trial peculiarities and follow-up were recorded and a descriptive analysis of the data was performed. RESULTS: Two patients (0.94%) refused to be included in a shunt independence trial and were analysed separately. In the other 28 patients, 29 shunt independence trials were performed, of which 19 (65.52%) were successful, giving a global rate of shunt independence of 8.96% (19/212) in our population. Secondary endoscopic third ventriculostomy was the most frequent type of independence trial and achieved the highest success rate (75%). Spontaneous independence was achieved in just 4/7 cases (57.14%). Planned removal of the shunt in overdrainage cases had a 50% success rate, with transient measures to control intracranial pressure frequently required. CONCLUSIONS: Shunt independence trials should be considered for selected patients in a closely monitored setting. Secondary endoscopic third ventriculostomy at the time of shunt malfunction has the highest success rate whereas planned removal of the shunt in overdrainage is an invasive procedure with more likelihood of failure. Shunt independence should not be presumed.

Conocimiento del cáncer de mama en estudiantes de enfermería

Objetivo: Este estudio evaluó el conocimiento acerca del cáncer de mama en estudiantes de Enfermería de universidades de la ciudad de Chillán. Material y método: Estudio descriptivo, transversal en estudiantes de Enfermería de tercer y cuarto año, correspondientes a tres universidades de Chillán, Chile. La muestra estuvo conformada por 187 estudiantes, a quienes se les aplicó una encuesta sobre conocimiento respecto del cáncer de mama. Resultados: La mayoría de los estudiantes presentó conocimiento para distinguir signos síntomas, tratamientos y diagnósticos sobre el cáncer de mama como futuros profesionales de la salud. Con respecto a los factores de riesgo y protectores relacionados al cáncer de mama, se observó una dificultad para reconocerlos. Respecto a la realización de la mamografía, el 80,7% indicó que se debía realizar antes de los 30 años, sin embargo, de acuerdo a las guías clínicas, ésta se debe realizar después de los 50 años cuando no existen antecedentes familiares. Conclusión: Los estudiantes manifiestan adquisición de conocimientos respecto de la guía clínica, pero con dificultad para identificar factores de riesgo, protectores, e información específica respecto del tratamiento. Es necesario fortalecer la educación acerca de la prevención de cáncer de mama en los programas de estudio del área de la salud y promover la promoción de la salud.

Objective: This study assessed the knowledge about breast cancer among Nursing students from universities in the city of Chillán (Chile). Materials and methods: Descriptive, cross-sectional study carried out with third and fourth-year Nursing students from three universities of Chillan. The sample consisted of 187 students, who answered a survey related to their knowledge about breast cancer. Results: Most of the students demonstrated sufficient knowledge to distinguish signs and symptoms, treatments, and diagnoses of breast cancer as prospective healthcare practitioners. Difficulties regarding recognition of risk and protective factors related to breast cancer were observed. In relation to mammography tests, 80.7% indicated that they are performed before the age of 30. According to clinical guidelines, however, they should be performed after the age of 50, when there is no family history related to the disease. Conclusion: Students report knowledge of clinical guidelines, though it is difficult for them to identify risk and protective factors as well as specific treatment information. It is thus necessary to improve the level of education related to the prevention of breast cancer in study programs and encourage health promotion.

Objetivo: Este estudo avaliou o conhecimento sobre o câncer de mama em estudantes de Enfermagem das universidades da cidade de Chillán. Métodos: Estudo descritivo, transversal em estudantes de Enfermagem do terceiro e quarto ano, correspondente a três universidades em Chillán, Chile. A amostra foi composta por 187 estudantes que receberam um questionário sobre o conhecimento sobre o câncer de mama. Resultados: A maioria dos estudantes apresentou conhecimentos para distinguir os sinais, sintomas, tratamentos e diagnósticos sobre câncer de mama como profissionais da saúde. No entanto, os estudantes mostraram dificuldade em reconhecer exatamente quais eram os fatores de risco e fatores de proteção relacionados ao câncer de mama. Em relação à mamografia, 80,7% indicaram que o exame devia ser feito antes dos 30 anos, porem as guias clínicas indicam que deve ser feito após 50 anos, quando não há história familiar. Conclusão: Os alunos manifestam a aquisição de conhecimento em relação à diretriz clínica, mas com dificuldade em identificar fatores de risco, protetores e informações específicas sobre o tratamento. É necessário fortalecer a educação sobre a prevenção do câncer de mama nos programas de estudo da área da saúde e promover a promoção da saúde.

Kinetics of Intratumoral Immune Cell Activation During Chemoradiation for Cervical Cancer.

PURPOSE: Radiation therapy has direct cytotoxic effects on tumor-infiltrating lymphocytes, but it also has immune stimulatory effects that increase immune cell infiltration. The dynamics of these competing effects on immune cells at the site of the tumor are poorly characterized during chemoradiation treatment (CRT) because of the difficulty of obtaining consecutive tumor biopsies. We used a minimally invasive cervical cytobrushing method to analyze the kinetics of intratumoral immune cell changes in patients with cervical cancer during CRT. METHODS AND MATERIALS: Cervical brushings were obtained from 20 patients with cervical cancer at baseline and during fractionated radiation therapy and cisplatin (weeks 1, 3, and 5). Matching peripheral blood mononuclear cells were obtained from 9 patients at the same time points. Cells were analyzed using multispectral flow cytometry to identify T cell and myeloid cell subsets and their activation status. Changes in immune cell subsets throughout treatment were calculated using matched-pair analysis with Wilcoxon rank sum test. RESULTS: We observed a significant decline in CD3+ total T cells, as well as CD8+ and CD4+ T-cell subsets in the first week of treatment from baseline, followed by variable expansion at weeks 3 and 5. This coincided with higher levels of proliferating CD8+ T cells expressing Ki67 at week 3 of treatment. The percentages of activated CD8+ T cells expressing CD69 continuously increased over the course of treatment, whereas the percentage of activated CD11c+CD11b- dendritic cells was highest during the first week. Many of these changes were not observed in the blood. CONCLUSIONS: Our results identified immune dynamic changes during CRT, indicating that CRT may be immune activating at the site of the tumor. This study also suggests the importance of sequential analyses of the local tumor microenvironment in addition to peripheral blood.

A healthy HLA-matched baby born by using a combination of aCGH and Karyomapping: the first latin american case.

PGD for HLA typing is a procedure that can be performed when an affected child requires a transplant to treat a non-hereditary disorder related to the hematopoietic and/or immune system. Hematopoietic stem cell transplantation from an HLA-identical donor provides the best treatment option. Three conventional ovarian stimulation procedures for IVF were performed in a couple with a 10-year-old child diagnosed with T-cell acute lymphoblastic leukemia of high risk. Trophectoderm biopsy and aCGH examination were performed on 15 blastocysts, three on the first IVF procedure, four on the second cycle, and eight on the third. Three euploid blastocysts HLA-compatible with the genome of the affected child were identified. One euploid blastocyst HLA-compatible with the affected child was warmed and transferred, resulting in an HLA-matched live birth. In conclusion, combined aCGH for aneuploidy screening and Karyomapping may be performed in a single biopsy procedure.

Mosaic embryo transfer after oocyte in vitro maturation in combination with non-invasive prenatal testing (NIPT)-first report of a euploid live birth.

PURPOSES: The purpose of this study is to describe a healthy life birth after a mosaic embryo transfer in oocyte in vitro maturation (IVM). METHODS: Patient received minimal stimulation, starting on day 3 after menstrual period. No hCG trigger was administered. Oocyte retrieval was performed and oocytes were matured for 30 h. After denuding, mature oocytes were inseminated by ICSI. Embryos were cultured until blastocyst stage and biopsied. RESULTS: One euploid embryo after array comprehensive genome hybridization (aCGH) was diagnostic. However, the next-generation sequencing (NGS) re-analysis showed that embryo was a mosaic for chromosome 13 and 21. Nevertheless, pregnancy ultrasound scans and non-invasive prenatal test (NIPT-Verifi-Illumina) indicated a normal fetus development. Finally, a healthy baby was born after 38 weeks. Its weight was 4480 g, head circumference 36 cm, and total length of 51 cm. To confirm that the baby was chromosomically normal, an NGS test was performed in buccal cells, a normal profile was obtained. CONCLUSIONS: Our finding confirmed that mosaic embryo transfer would bring a healthy offspring.

Monitoring program for mammals in a protected area of Colombia / Programa de monitoreo de mamíferos en un área protegida de colombia / Programa de monitoração de mamíferos em uma área protegida em Colômbia

Abstract Between the second semester of 2009 and the first semester of 2011, camera traps were set up in conserved and disturbed habitats in the Otun Quimbaya Flora and Fauna Sanctuary. From a sampling effort of 2,066 camera-days, 673 photographs of 157 independent events were obtained for eight species of wild mammals and a domestic one. Their activity patterns were mainly nocturnal even for those species reported as diurnal. The impact of human interference and exotic species was evident for two species: Tapiruspinchaque and Cerdocyon thous. The former was observed below its altitudinal range with activity patterns mainly crepuscular and nocturnal. The second was observed in the same habitats where domestic dogs were found, with activity patterns mainly crepuscular and nocturnal. These findings suggest that both species have altered their activity patterns. Actions must be focused on decreasing the interaction of these mammals with humans and domestic dogs.

Resumen La información sobre los mamíferos de mediano y gran tamaño que habitan áreas protegidas en Colombia es cada vez más necesaria para impulsar acciones tendientes a su protección. La identificación completa de estas especies, sus números y sus patrones de actividad son esenciales en programas de monitoreo, especialmente por las relaciones entre estos animales y las dinámicas antropogénicas. El presente estudio se llevó a cabo en el Santuario de Flora y Fauna Otún-Quimbaya (Colombia). Entre el segundo semestre de 2009 y el primer semestre de 2011, se colocaron trampas cámara en áreas conservadas y perturbadas del Santuario de Flora y Fauna Otún-Quimbaya. Con un esfuerzo de muestreo de 2066 días-cámara se obtuvieron 673 fotografías de 157 eventos independientes para 8 especies silvestres y una doméstica. Los patrones de actividad observados fueron principalmente nocturnos, incluso para especies reportadas como diurnas. El impacto de la interferencia humana y de las especies exóticas fue evidente en 2 especies: Tapirus pinchaque y Cerdocyon thous. La primera fue observada por debajo de su rango altitudinal con patrones de actividad principalmente crepusculares y nocturnos. La segunda se observó en los mismos hábitats donde se encontraron los perros domésticos, con patrones de actividad principalmente crepusculares y nocturnos. Estos hallazgos sugieren que ambas especies han alterado sus patrones de actividad. Es necesario enfocar acciones en la disminución de la interacción de estos mamíferos con los humanos y con perros domésticos.

Resumen Entre o segundo semestre de 2009 e o primeiro semestre de 2011, câmeras foram armadas em habitats conservados e perturbados no Santuário de Flora e Fauna Otún Quimbaya. A partir de uma amostragem de 2066 dias de instalação da câmera, foram obtidas 673 fotografias de 157 eventos independentes para oito espécies de mamíferos selvagens e uma espécie doméstica. Os padrões de atividade observados eram principalmente noturnos, inclusive para espécies reportadas como diurnas. O impacto da interferência humana e de espécies exóticas foi observado para duas espécies: Tapirus pinchaque e Cerdocyon thous. A primeira foi observada abaixo de seu intervalo de altitude com padrões de atividade majoritariamente crepuscular e noturno. A segunda espécie foi observada nos mesmos habitats em que espécies de cachorros domésticos foram observados, com padrões de atividade majoritariamente crepuscular e noturno. Estes resultados sugerem que ambas as espécies alteraram seus comportamentos padrão. Ações devem ser focalizadas para reduzir a interação de estes mamíferos com os humanos e cães domésticos.

Effect of transfection and co-incubation of bovine sperm with exogenous DNA on sperm quality and functional parameters for its use in sperm-mediated gene transfer.

Sperm-mediated gene transfer (SMGT) is based on the capacity of sperm to bind exogenous DNA and transfer it into the oocyte during fertilization. In bovines, the progress of this technology has been slow due to the poor reproducibility and efficiency of the production of transgenic embryos. The aim of the present study was to evaluate the effects of different sperm transfection systems on the quality and functional parameters of sperm. Additionally, the ability of sperm to bind and incorporate exogenous DNA was assessed. These analyses were carried out by flow cytometry and confocal fluorescence microscopy, and motility parameters were also evaluated by computer-assisted sperm analysis (CASA). Transfection was carried out using complexes of plasmid DNA with Lipofectamine, SuperFect and TurboFect for 0.5, 1, 2 or 4 h. The results showed that all of the transfection treatments promoted sperm binding and incorporation of exogenous DNA, similar to sperm incorporation of DNA alone, without affecting the viability. Nevertheless, the treatments and incubation times significantly affected the motility parameters, although no effect on the integrity of DNA or the levels of reactive oxygen species (ROS) was observed. Additionally, we observed that transfection using SuperFect and TurboFect negatively affected the acrosome integrity, and TurboFect affected the mitochondrial membrane potential of sperm. In conclusion, we demonstrated binding and incorporation of exogenous DNA by sperm after transfection and confirmed the capacity of sperm to spontaneously incorporate exogenous DNA. These findings will allow the establishment of the most appropriate method [intracytoplasmic sperm injection (ICSI) or in vitro fertilization (IVF)] of generating transgenic embryos via SMGT based on the fertilization capacity of transfected sperm.

Surgical outcome of the shunt: 15-year experience in a single institution.

PURPOSE: Surgical outcome after shunt insertion in pediatric hydrocephalus can vary greatly. Although first shunt survival rates and complications have been studied by several teams, much less is known about survival and complications of subsequent systems. The goals of this study were to evaluate the surgical outcome in a series of pediatric patients followed for a long time and establish the differences between first and subsequent extracranial shunt survival and complications. METHODS: We undertook a retrospective study in pediatric patients treated with ventriculoperitoneal shunts between 2000 and 2015 at our institution. Surgical outcome was assessed, and different shunt survival curves were studied with Kaplan-Meier. Complications related to each shunt failure were examined and compared. RESULTS: A total of 166 patients underwent 425 procedures, with a mean follow-up period of 93 months. The median number of shunt revision surgeries was 2. Shunt survival rates were better with the first shunt compared to those with the subsequent shunts. The main complication necessitating system revision surgery was overdrainage, the frequency of proximal and distal dysfunctions was similar in all the shunt failures, and isolated ventricle and infection were more frequent in younger patients. Shunt-related infections accounted for 7 % of the procedures, and the shunt independence rate was 10 %. CONCLUSIONS: The frequency of complications related to shunt failure in pediatric patients changes during follow-up. A strict protocol of overdrainage detection and active treatment could explain the need for repeat surgeries and the progressively shorter shunt survival time in our series.

Intoxicación con anís de estrella en niños menores de 12 meses, en el Hospital Nacional de Niños Doctor Carlos Sáenz Herrera durante el periodo 2001-2005 / Star anise intoxication in children less than 12 months old, at the National Children´s Hospital Doctor Carlos Sáenz Herrera during the period 2001-2005

Objetivo: Siendo el uso de anís de estrella nocivo en muchos casos es importante obtener los datos correspondientes a nuestro país para convertirlo en un tema de interés público y lograr, en base a evidencia clara, la intervención del Ministerio de Salud y poder evitar la venta libre de este producto que se utiliza popularmente sin ninguna restricción. La idea principal de obtener estos datos locales es divulgar la información a padres de familia y comunidad médica en relación al uso del anís de estrella y sus efectos secundarios enfatizando el adecuado manejo del cólico del lactante, así como de las madres durante la lactancia. Métodos: Es un estudio retrospectivo y descriptivo, en el cual se revisará la presentación clínica y la epidemiología de la toxicidad por anís de estrella en niños menores de 12 meses, que fueron hospitalizados en el Hospital Nacional de Niños Dr. Carlos Sáenz Herrera, durante el período comprendido del 1 de Enero 2001 al 31 de diciembre 2005. Los pacientes se reclutaron utilizando la base de Documentos Médicos y Estadística del HNN y los registros del Centro Nacional de Intoxicaciones en el periodo descrito. Resultados: Durante el periodo de estudio se reportaron como ingresos 68 casos de intoxicación por anís de estrella, de los cuales solo 47 fueron incluidos. El 53.2 por ciento eran mujeres. La edad promedio fue de 34.4 días, rango 3-111 días, de ellos el 91.5 por ciento eran recién nacidos de termino. Los síntomas gastrointestinales se presentaban previo a la intoxicación fueron distensión abdominal en un 61.7 por ciento y vómitos en un 14.8 por ciento. Un 91.5 por ciento se intoxicaron por la ingestión del te y un 4.25 por ciento por lactancia materna. La causa más frecuente por la que se utilizó el te fue por cólicos, 57.4 por ciento, con una exposición a una dosis leve en el 53 por ciento de los niños, menos de 5 estrellas. La estancia hospitalaria promedio fue de 2 días. Entre los síntomas y signos más comunes presentes en los casos estudiados se encuentran los de índole neurológica, como: la irritabilidad en un 97.8 por ciento, seguida por espasticidad en 70 por ciento, desviación de mirada 57.4 por ciento, hiperreflexia 49 por ciento, pobre succión 44.7 por ciento, movimientos oculogiros 36 por ciento y convulsiones 32 por ciento entre otros. De la sintomatología gastrointestinal, la distensión abdominal se presento en un 40.4 por ciento y los vómitos en el 55.3 por ciento. Conclusiones: La mayoría de los casos ocurren el lactantes de termino menores de 2 meses, en los cuales el te fue administrado por síntomas gastrointestinales, presentando manifestaciones neurológicas a pesar de una exposición leve al tóxico. Se debe instar al Ministerio de Salud a una adecuada comercialización de dicho producto, y a los médicos sobre una adecuada educación e información a la población general sobre los posibles efectos adversos y consecuencias de una intoxicación con anís de estrella.

Una propuesta de tratamiento multimodal en nlos y jóvenes con retraso mental y otros trastornos psiquiátricos / No disponible

Introducción. La patología infanto-juvenil frecuentemente exige modelos de tipo integrativo que aseguren una mayor eficacia. Presentamos un modelo de atención multidisciplinaria en un Hospital psiquiátrico provincial dirigido a niños y jóvenes con retraso mental y otros diagnósticos psiquiátricos. Objetivo. Describir un modelo de intervención multimodal. Método. Diseño de serie de casos en el que se describe un esquema de trabajo y enfoque interdisciplinarios. Resultados. Un total de 20 pacientes entre los 5 y 29 años están internados actualmente en manejo de larga estancia en nuestra unidad infanto-juvenil, 17 con retraso mental, 1 con trastorno depresivo y los otros 2 con trastornos de personalidad y comportamiento, y según su nivel de desempeño 11 son semifuncionales y los restantes funcionales. Se ha instau­rado un modelo de intervención multi­modal observándose una reducción en su sintomatología psiquiátrica, en muchos un mejor desempeño ocupacional e interacción con su entorno. Además, se han realizado 12 ingresos para hospitalización de menores en fase aguda con un promedio de estancia de 13,8 días en quienes también se ha utilizado este modelo con una adecuada remisión de su sintomatología.Conclusiones. El modelo presentado nos ha permitido incidir de manera sinérgica sobre la amplia problemática de nuestros pacientes. Representa un reto para el equipo terapéutico darle continuidad y mayor estructuración a este esquema de intervención (AU)

Introduction. Childhood and youth psychiatric disorders often require an integrative approach to ensure efficacy. This article describes a multidiscipli­nary treatment paradigm for children and adolescents with mental retarda-tion and other psychiatric disorders.Objective. To describe a multimodal treatment paradigm for childhood and youth psychiatric disorders.Methods. Series case report. Results. A group of 20 patients ages 5 to 29 were admitted to long-term hospitalization to the unit. Seventeen have a diagnosis of mental retardation, one with depressive disorder, and two with personality and behavioral disorders, and according to their functional level 9 of them have an adequate level of function and 11 have some degree of functional compromise. We use a multimodal paradigm of intervention and observed decreased symptoms and in many of them, better social and occupational performance. Moreover, we used the same model in 12 patients admitted to an acute setting, with an average length of stay of 13.8 days, and also found improvement of their symptoms.Conclusions. Our multimodal treatment paradigm has significantly improved the complex presentation of our patient population. The challenge is to optimize and ensure continuity of this model (AU)

Effect of letrozole at 2.5 mg or 5.0 mg/day on ovarian stimulation with gonadotropins in women undergoing intrauterine insemination.

OBJECTIVE: To determine the effect of combined therapy of letrozole (2.5 mg or 5.0 mg) with recombinant follicle-stimulating hormone (FSH) in comparison with the administration of recombinant FSH alone in an intrauterine insemination (IUI) program. DESIGN: Retrospective study. SETTING: Assisted fertilization program in a specialized infertility center. PATIENT(S): 110 women undergoing IUI and gonadotropin therapy. INTERVENTION(S): Recombinant FSH alone administered from day 3 or combined with letrozole, 2.5 or 5.0 mg/day, on days 3 to 7, and gonadotropins starting on day 7 of the menstrual cycle. Transvaginal ultrasound examinations were done until the dominant follicle reached 18 mm in diameter. Ovulation was triggered with 10,000 IU of human chorionic gonadotropin (hCG), and IUI performed 30 to 40 hours later. MAIN OUTCOME MEASURE(S): Recombinant FSH dose required, number of follicles greater than 14 mm and 18 mm, endometrial thickness, pregnancy rates, miscarriages, and characteristics of newborns. RESULT(S): Women treated with FSH and 5.0 mg/day of letrozole required a lower dose of FSH than the group cotreated with 2.5 mg/day of letrozole or with FSH alone. Throughout most of the follicular phase, the endometrial thickness was statistically significantly less in both letrozole cotreatment groups compared with the FSH control group. By the day of hCG administration, the endometrial thickness was comparable among all the groups. The pregnancy rates were the same with recombinant FSH alone or combined with letrozole. CONCLUSION(S): In terms of cost-effectiveness, 5.0 mg/day of letrozole is more effective than the 2.5 mg/day in cotreatment with no adverse effect on pregnancy rate or outcome.